CN212389600U

CN212389600U - Oil cylinder with sealing and waterproof functions

Info

Publication number: CN212389600U
Application number: CN202020770505.7U
Authority: CN
Inventors: 翁祖铨; 范晓龙
Original assignee: Longyan Shanli Engineering Hydraulic Co ltd
Current assignee: Longyan Shanli Engineering Hydraulic Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-01-22
Anticipated expiration: 2030-05-11

Abstract

The utility model belongs to the technical field of the hydro-cylinder technique and specifically relates to a hydro-cylinder with waterproof sealing function, including piston rod, the uide bushing and the cylinder cap of setting at the cylinder front end of cylinder, sliding connection in the cylinder, the piston rod can partly stretch out outside the cylinder, the cylinder cap is provided with waterproof sealing structure with the contact site of piston rod, waterproof sealing structure is including setting up at the first recess of cylinder cap inside wall, setting up waterproof circle of U type in first recess, setting up the waterproof circle of O type in the waterproof circle lip of U type, the opening of the waterproof circle of U type is towards the cylinder front end. Through turning over the dress with waterproof circle of U type (the opening of waterproof circle of U type is towards the cylinder front end promptly), and set up waterproof circle of O type in waterproof circle lip of U type, utilized waterproof circle of O type under the condition of low pressure, help waterproof circle lip of U type fully expand, with the cell wall of first recess abundant contact, reach good water-proof effects, prevent that fluid emulsifies in the hydro-cylinder.

Description

Oil cylinder with sealing and waterproof functions

Technical Field

The utility model relates to a hydro-cylinder technical field especially relates to a hydro-cylinder with waterproof sealing function.

Background

At present, the oil cylinder prevents external dust or moisture, and a dust ring is generally arranged on a guide sleeve of the oil cylinder in a mode that a piston rod enters the oil cylinder, and the dust or moisture adhered on the piston rod is removed in a mode of mechanical blocking and scraping by utilizing the tight fit of a dust lip edge of the dust ring and the piston rod of the oil cylinder.

However, when the dust ring is not tightly matched with the piston rod, the dust ring is damaged, and the piston rod is fast in expansion and contraction, the service life of the dust ring is shortened, and the effects of dust prevention, water prevention and leakage prevention are not good.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned not enough, provide a hydro-cylinder with waterproof sealing function, waterproof, dustproof, the antiseep effect is better, greatly reduced the risk that the hydro-cylinder became invalid, prolonged the life of hydro-cylinder greatly.

In order to achieve the above object, the technical solution of the present invention is: the utility model provides an hydro-cylinder with waterproof sealing function, includes piston rod, the uide bushing and the cylinder cap of setting at the cylinder front end of cylinder, sliding connection in the cylinder, the piston rod can partially stretch out outside the cylinder, the cylinder cap is provided with waterproof sealing structure with the contact site of piston rod, waterproof sealing structure is including setting up at the first recess of cylinder cap inside wall, setting up waterproof circle of U type in first recess, setting up the waterproof circle of O type in the waterproof circle lip of U type, the opening of the waterproof circle of U type is towards the cylinder front end. The U-shaped waterproof ring is reversely arranged (namely the opening of the U-shaped waterproof ring faces the front end of the cylinder barrel), the O-shaped waterproof ring is arranged in the U-shaped waterproof ring lip, the O-shaped waterproof ring is utilized under the condition of low pressure, the U-shaped waterproof ring lip is helped to be fully expanded, the U-shaped waterproof ring lip is fully contacted with the groove wall of the first groove, a good waterproof effect is achieved, and oil in the oil cylinder is prevented from emulsifying.

Preferably, a protruding ring is arranged on one side face, close to the cylinder cover, of the U-shaped waterproof ring, and a concave ring for inserting the protruding ring is arranged at the bottom of the first groove. Through in inserting protruding circle concave ring, increase the area of contact of the waterproof circle of U type and cell wall, played the effect of location, when preventing that the piston rod from sliding, cause the waterproof circle of U type not hard up and influence the waterproof seal effect of the waterproof circle of U type.

Preferably, a support ring is arranged in the cylinder barrel, and the front end face of the support ring is fixedly connected with the guide sleeve.

Preferably, the place ahead of waterproof sealing structure is provided with dustproof construction, dustproof construction is including setting up at the second recess of cylinder cap inside wall, setting up the dust ring in the second recess, the preceding terminal surface of cylinder cap is stretched out to the front end of dust ring, prevents that outside dust from getting into the hydro-cylinder in, dustproof effect is good.

Preferably, a U-shaped sealing ring is arranged between the cylinder cover and the guide sleeve, and an opening of the U-shaped sealing ring faces to the rear end of the cylinder barrel. The U-shaped sealing ring plays a role in oil sealing and prevents oil in the oil cylinder from emulsifying.

Preferably, the rear of the waterproof sealing structure is provided with an oil sealing structure, and the oil sealing structure comprises a third groove arranged on the inner side wall of the cylinder cover and a piston sealing ring arranged in the third groove.

Through adopting foretell technical scheme, the beneficial effects of the utility model are that:

(1) through turning over the dress with waterproof circle of U type (the opening of waterproof circle of U type is towards the cylinder front end promptly), and set up waterproof circle of O type in waterproof circle lip of U type, utilized waterproof circle of O type under the condition of low pressure, help waterproof circle lip of U type fully expand, with the cell wall of first recess abundant contact, reach good water-proof effects, prevent that fluid emulsifies in the hydro-cylinder.

(2) Through in inserting the protruding circle on the waterproof circle of U type into the concave circle in the first recess, increase the area of contact of the waterproof circle of U type and cell wall, played the effect of location, when preventing that the piston rod from sliding, cause the waterproof circle of U type not hard up and influence the waterproof sealing effect of the waterproof circle of U type.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is an enlarged view at B in fig. 2.

Description of the main reference numerals: (1, a cylinder barrel; 11, a support ring; 2, a piston rod; 3, a guide sleeve; 4, a cylinder cover; 41, a U-shaped sealing ring; 5, a sealing waterproof structure; 51, a first groove; 52, a U-shaped waterproof ring; 53, an O-shaped waterproof ring; 54, a convex ring; 55, a concave ring; 6, a dustproof structure; 61, a second groove; 62, a dustproof ring; 7, an oil sealing structure; 71, a third groove; 72, a piston sealing ring).

Detailed Description

The invention is further described with reference to the following figures and specific examples.

As shown in fig. 1-2, an oil cylinder with a sealing and waterproof function comprises a cylinder barrel 1, a piston rod 2 slidably connected in the cylinder barrel 1, a guide sleeve 3 arranged at the front end of the cylinder barrel 1, and a cylinder cover 4, wherein the piston rod 2 can partially extend out of the cylinder barrel 1, a sealing and waterproof structure 5 is arranged at the contact part of the cylinder cover 4 and the piston rod 2, the sealing and waterproof structure 5 comprises a first groove 51 arranged on the inner side wall of the cylinder cover 4, a U-shaped waterproof ring 52 arranged in the first groove 51, and an O-shaped waterproof ring 53 arranged in the lip of the U-shaped waterproof ring 52, and the opening of the U-shaped waterproof ring 52 faces the front end of the cylinder barrel 1. The U-shaped waterproof ring 52 is reversely installed (namely, the opening of the U-shaped waterproof ring 52 faces the front end of the cylinder barrel 1), the O-shaped waterproof ring 53 is arranged in the lip of the U-shaped waterproof ring 52, and the O-shaped waterproof ring 53 is utilized to fully expand the lip of the U-shaped waterproof ring 52 under the condition of low pressure, fully contact with the groove wall of the first groove 51, achieve a good waterproof effect and prevent oil liquid in the oil cylinder from emulsifying.

As shown in fig. 3, a convex ring 54 is arranged on one side surface of the U-shaped waterproof ring 52 close to the cylinder cover 4, and a concave ring 55 for inserting the convex ring 54 is arranged at the bottom of the first groove 51. The contact area between the U-shaped waterproof ring 52 and the groove wall is increased by inserting the convex ring 54 into the concave ring 55, so that the positioning effect is achieved, and the sealing and waterproof effect of the U-shaped waterproof ring 52 is prevented from being influenced by the looseness of the U-shaped waterproof ring 52 when the piston rod 2 slides.

A support ring 11 is arranged in the cylinder barrel 1, and the front end face of the support ring 11 is fixedly connected with the guide sleeve 3.

The place ahead of waterproof seal structure 5 is provided with dustproof construction 6, dustproof construction 6 is including setting up second recess 61, the dust ring 62 of setting in second recess 61 at 4 inside walls of cylinder cap, the preceding terminal surface of cylinder cap 4 is stretched out to the front end of dust ring 62, prevents that outside dust from getting into in the hydro-cylinder, and dustproof effect is good.

A U-shaped sealing ring 41 is arranged between the cylinder cover 4 and the guide sleeve 3, and an opening of the U-shaped sealing ring 41 faces to the rear end of the cylinder barrel 1. The U-shaped sealing ring 41 plays a role in oil sealing and prevents oil in the oil cylinder from emulsifying.

The rear of the waterproof sealing structure 5 is provided with an oil sealing structure 7, and the oil sealing structure 7 comprises a third groove 71 arranged on the inner side wall of the cylinder cover 4 and a piston sealing ring 72 arranged in the third groove 71.

This embodiment is through turning over the dress with U type waterproof ring 52 (the opening of U type waterproof ring 52 is towards the cylinder 1 front end promptly), and has set up O type waterproof ring 53 in U type waterproof ring 52 lip, has utilized O type waterproof ring 53 under the condition of low pressure, and help U type waterproof ring 52 lip fully expand, with the cell wall of first recess 51 fully contact, reaches good water-proof effects, prevents the emulsification of fluid in the hydro-cylinder. In addition, the convex ring 54 on the U-shaped waterproof ring 52 is inserted into the concave ring 55 in the first groove 51, so that the contact area between the U-shaped waterproof ring 52 and the groove wall is increased, the positioning effect is achieved, and the sealing and waterproof effect of the U-shaped waterproof ring 52 is prevented from being influenced by the looseness of the U-shaped waterproof ring 52 when the piston rod 2 slides.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited to the above description, and all the equivalent changes and decorations made according to the claims of the present invention should still fall within the scope covered by the present invention.

Claims

1. The utility model provides an hydro-cylinder with waterproof sealing function, includes cylinder, sliding connection piston rod, the uide bushing and the cylinder cap of setting at the cylinder front end in the cylinder, the piston rod can partly stretch out outside the cylinder, its characterized in that: the contact part of cylinder cap and piston rod is provided with sealed waterproof construction, sealed waterproof construction is including setting up at the first recess of cylinder cap inside wall, setting up the waterproof circle of U type in first recess, setting up the waterproof circle of O type in the waterproof circle lip of U type, the opening of the waterproof circle of U type is towards the cylinder front end.

2. The oil cylinder with the sealing and waterproof functions as claimed in claim 1, wherein: a side face, close to the cylinder cover, of the U-shaped waterproof ring is provided with a protruding ring, and the bottom of the first groove is provided with a concave ring for inserting the protruding ring.

3. The oil cylinder with the sealing and waterproof functions as claimed in claim 1, wherein: a support ring is arranged in the cylinder barrel, and the front end face of the support ring is fixedly connected with the guide sleeve.

4. The oil cylinder with the sealing and waterproof functions as claimed in claim 1, wherein: the place ahead of sealed waterproof construction is provided with dustproof construction, dustproof construction is including setting up at the second recess of cylinder cap inside wall, setting up the dust ring in the second recess, the preceding terminal surface of cylinder cap is stretched out to the front end of dust ring.

5. The oil cylinder with the sealing and waterproof functions as claimed in claim 1, wherein: a U-shaped sealing ring is arranged between the cylinder cover and the guide sleeve, and an opening of the U-shaped sealing ring faces to the rear end of the cylinder barrel.

6. The oil cylinder with the sealing and waterproof functions as claimed in claim 1, wherein: the rear of the sealing waterproof structure is provided with an oil sealing structure, and the oil sealing structure comprises a third groove arranged on the inner side wall of the cylinder cover and a piston sealing ring arranged in the third groove.